Clamping device for rotary shears



Dec. 25, 1923. 1,478,900

c. L. HUSTON ET Al.

CLAMPING DEVICE FOR ROTARY SHEARS 4 Sheets-Sheet 1 Filed Jur 1e l0 1920www l TIS-...1 0-

Dec. 2.5', 1923.

1,478,900 c. L. Hus'roN ET Al.

CLAMPING DEVICE FOR V,ROTARY SHEARS Filed; June l0 1920 4 Sheets-Sheet 2Dec. 25, 1923. v A 1,478,900

. C. L. HUSTON lET AL CLAMPING DEVICE FOR ROTARY SHEARS Filed June lO1920 4 Sheets-Sheet 3 ffm/Wwf Dec. 25, 1923.

C. L. HUSTON ET AL.

CLAMPING DEVICE 'FOR RTARY SHEARS 4 Sheets-Sheet 4 FiledrJune l0. 1920Patented Dec. 25, 1923.

NITED STATES CHARLES L. HUSTON AND ALFRED GOODFELLOW, OF COATESVILLE,PENNSYLVANIA.

CLAMPING DEVICE FOB,v ROTARY SHEARS.

Application filed .Tune 10, 1920. Serial No. 388,045.

To all whom t may con-cern:

Be it known that we, CHARLES L. HUsroN and ALFRED GooDrnLLow, citizensof the United States, and residents of Coatesville, county of Chester',State of Pennsylvania, have invented certain Improvements in ClampingDevices for Rotary Shears, .of which the following is a specification.

@ne object of our invention is to provide means for holding a platewhile being sheared so that it canbe rotated around an axis. Theinvention is particularly adapted for cutting circular plates, andespecially circular boiler plates.

A further object of the invention is to utilize a magnet for retainingthe plate onto the holding means.

A still further object of the invention is to provide means for allowingthe plate to rotate around one or two axes.

Still another object of the invention is to provide means for holdingthe plate in a given position so that a true circle can be cut, and astill further object is to provide means for accurately setting theplate on the magnet. j

In the accom-panying drawings:

' Fig. 1 is a longitudinal sectional view through our improved holdingmechanism showing only the cutting disks of the shears;

Fig. 2 is a view illustrating the gauge;

Fig. 3 is a plan view;

Fig. 4 yis ay sectional view on the line ift Fel;

Fig. 5l is a sectional view on the line 5 5, Fig. 1;

Fig. 6 is a diagrammatic plan view showing the correct adjustment O theholding disk in respect to the cutters; and Fig. 7 is a viewrillustrating the `machine when sections oi plates are being cut so as toobtain the full holding value of the magnetic disk.

Referring to the drawings, 1 is the frame of a shearing machine in which2 and 3 are the cutting disks. 4l is a bed plate on which is mounted aslide 5 capable of being moved towards `and from the cutting disks by afeed screw 6 adapted to bearings 7 in they bed plate 4. Any suitablemeans may be provided for turning this screw. The slide 5 has a nut 8through which the screw eX- tends. Mounted on the slide is a secondslide 9 which is moved 'at right angles to the slide 5 by means of ascrew 10 adapted to a nut l10n the slide. On the screw is a hand wheel12 by which it is turned. Ar-

ranged torotate on the slide 9 is a carrier 13 having a pivot pin letmounted ina center bearing on the slide 9. In order to allow it to turnfreely, we provide, in the present instance, a ball lbearing 15. On theperiphery of the carrier are teeth '16 and meshing with these teeth is aworm wheel 17'on a shaft 18 driven by a motor 18CL Fig. 1, By turningthe worm shaft 18, the carrier can be turned on its pivot as desired. Byoperating the two screws 6k and 10, the carrier canbe ymoved into anyposition. Pivotally mounted on the carrier 13 isa bracket 19, which isheld iirmly to the carrier 13 by the pressure of a spring 20 on thepivot pin 14 which extends through an opening in the' carrier as well asin the slide 9, the spring 20 being held between a nut 2l on this pinand a shoulder on the bracket.

The bracket may be of any length desired, depending'upon the size of themachine to which the invention is applied.y The bracket carries at itsouter end the means for holding and supporting the disk. On the bracketis' an annular support 22 having a raceway in which are balls 23 andmounted on these balls is a raceway 24 having a spindle 25 held to thebracket by means of a4 cen-k tral bolt 26 so that while the spindle canturn freely on the bracket it is held in place by the bolt. disk 27carrying the magnets 28, and on the hub 29l of the spindle are terminals30 and 31 connected to wires 32. Thesewires eX- tend through the hollowspindle 14 and to any convenient point so as to connect'with the wiresleading from any source of electric energy. The electric wiringwismerely shown in diagram as this may be changed accordinto the design andtype oi the inachine. l/ e have also shown the magnets 28 s in diagram.'

`In order to lock the raceway 24: to the raceway 22, We provide pins 33,which are preferably tapered. On the bracket 19 is a projection 34 andon a suitable post 35 is` a vertically adjustable bar 36, which carriesan adjusting screw 37 against which the projection 34 rests when themechanism is in the cutting position so thaton turn ing the screw theplate can be brought into correct position in respect to the cuttingline. By lowering the bar 36 it will allow the bracket to swino freely.Projecting from the post is a bracket 38, and on the bracket 19 is awheel 39. The post supports Mounted on the spindle is a V the bracket 19when the parts are in the cutting position.

Referring to the diagram, Fig. 6, it Will be noticed that the cuttingline as is at one side or' the center line g/ of the cutting disks 2 and3, and by adjusting the bracket by means of the set screvv 37 so as tobring the center e ot' the magnetic holding disks 22 on the yline theshears Will cut a true circle, the center e being the center et thecircle. 1t, however, the holding disk be prevented 'from turning by thepins 33, then the center au. is the center otrotation and this center wis the center on Which the bracket 19 swings. llVhen it is desired tocut a segmental plate, such as a', shown in Fig. 7, then the bracket 19may be shifted so'that the held disk Will be at one side ot the center,as shown at e', and the entire magnetic surface will be used to hold thesegment While the cut is being made. The dotted line illustrates asegmental plate on the opposite side of the center line w of themachine, supported by the holding plate When its center is in theposition In order to accurately locate the plates on the magnet holderprior to shearing,y

We mount under the disk 27, a floating ring 40 held to the disk by ringor lugs 41 secured to the disk by bolts or other tastening. In thelioating ring 40 are a series of holes into one ot which is inserted agauge in the form or' a rod 42 on which is an adjustable `linger 43,bent as shown; the rod is graduated and the finger can be held by a setscrew in any position desired.

The gauge and its ring can be turned and after the plate has beenaccurately located, the rod is removed from the ring.

.For the purpose of moving the plate into correct position on themagnet, We `provide a trame 44 pivoted at 45 to uprights on the bracket19. The outer end or' the frame 44 is attached by a link 46 to an arm 47on a shaft 48 geared to the shaft of an electric -motor 49, mounted onan extension 19a of the bracket 19. 0n the frame 44 are the rollers 50spaced apart as shown in Fig. 3. When it is desired to adjust the plate,the trame is raised so that the plate is supported by the edge of thedisk 27 and the tvvo rollers 50. When in this' position the plate can bereadily moved into true position for cutting, after which the frame islowered and the plate Will rest on the disk as shown in Thusl it Will beseen by the above description that We are enabled to accurately locate aplate on the holder and provide means for firmly holding the plate inproper position so that when movement is imparted to the plate thecutters will cut an accurate circle and the holding device can be movedtowards and trom the cutters and the plate can be turned on the centere, or on the center w, as desired.

As hereinbetore stated, if a segment oi a plate is to be cut then thebracket 19 is shifted so that the entire surface of the holding disk isused to support the segment of the plate.

We claim:

1. rlhe combination in plate-holding mechanism for shearing machines, ofa bed located in front ot the shears; a slide mounted on the bed; meanstor moving the slide to and from the shears; a second slide mounted onthe first slide and adapted to transverse Ways on the first slide; abracket rotatably mounted solely on the second slide; a motor on saidslide for turning the bracket; `and a plate holding disk pivotallymounted on the slide, said disk having magnets by which the plate isheld to the disk.

2. The combination in plate holding mechanism, of a support; a diskmounted on said support; magnets carried by the disk; a ring locatedunder the disk and free to turn thereon, said ring having a series otholes; a rod adapted to any one of the holes; and an adjustable fingeron the rod forming a gauge.

3. The combination in plate holding mechanism for shearing and likemachines, ot a support; a magnetic holding device; and a trame havingrollers arranged to engage a plate; and means for raising the trame sothat the plate is supported by the rollers and the edge ot the magneticholding device.

4. The combination in plate holding mechanism for shearing and likemachines, of a support, a magnetic holding device lfor a plate; a tramepivoted to the support; means for raising and lowering the frame; tworollers mounted on the frame, said rollers being spaced apart, andarranged to lift one side of the plate ol' of the holding device toallow for adjustment of said plate on the holding device.

1n Wit-ness whereof We aiiX our signan tures.

CHARLES j L. HUSTON. ALFRED GOODFELLOW.

